Echoes by Pink Floyd is long, any other tracks longer than that?!

Echoes by Pink Floyd is long, any other tracks longer than that?

Echoes on album Meddle is long. Does anyone know of any other tracks recorded since the 1960's that is as long or longer? How many minutes are the tracks that you know of? I think the Orb did a few long ones as did Orbital. Echoes is 23 minutes 31 seconds.

1 week ago
Excluding Classical/Opera etc. I am refering to Rock and/or Electronica/Dance/Ambient

4 days ago
I am going to put this one to vote

Okay:
Genesis: Supper's Ready is 24 min 32
Phish: Union Federal is 25 Min 30
Led Zeppelin: Dazed and Confused (live on Song remains the Same) is 26 min 52.
Mars Volta: Cassandra Gemini is 32 min 31.
The Orb: Blue Room is 39 min 58" (the longest ever top 40 single - 2 seconds under the maximum allowable length of a single for chart purposes)
Dream Theater: Six Degress of Inner Turbulence is 42 min 04
Jethro Tull: Thick As A brick is 43 min 44
Mike Oldfield: Amcrok is about an hour.
Mark Mallman: Marathon 1 was 26 Hours 12 mins (yes, hours)
Mark Mallman: Marathon 2 was 52 hours 24 mins
These last two are listed as 'was' as they were rock pieces performed live and pretty much improvised...